How to display post by category in wordpress

<?php
$args = array( ‘post_type’ => ‘post’,’cat’=>’9′,’order’ => ‘ASC’,’posts_per_page’ => 3);
$the_query = new WP_Query( $args );
?>

<?php if ( $the_query->have_posts() ) : ?>

<?php while ( $the_query->have_posts() ) : $the_query->the_post(); ?>
<?php the_post_thumbnail(); ?>
<?php the_title(); ?>
<?php the_content(); ?>

<?php endwhile; ?>
<?php endif; ?>